This paper presents a continuous-time ΣΔ ADC for MEMS microphone integrated interface applications. The ΣΔ modulator features a 3rd-order loop filter realized with only two operational amplifiers to reduce power consumption. It exploits a 15-level quantizer and 3-MHz sampling frequency to minimize the impact of clock jitter. The proposed architecture can handle an excess loop delay of half period of the sampling clock. The ΣΔ modulator, simulated at transistor-level, performs a 105.5dB A-weighted dynamic range (DR) and a 100.8 dB signal-to-noise-and- distortion ratio (SNDR) at -2 dBFS. The device operates from a single 1.8 V and consumes 200 μW. © 2013 IEEE

De Berti, C., Malcovati, P., Crespi, L., Baschirotto, A. (2013). A low-power, continuous-time sigma-delta modulator for MEMS microphones. In Conference Proceedings - 9th Conference on Ph. D. Research in Microelectronics and Electronics, PRIME 2013 (pp.53-56) [10.1109/PRIME.2013.6603116].

A low-power, continuous-time sigma-delta modulator for MEMS microphones

BASCHIROTTO, ANDREA
Ultimo
2013

Abstract

This paper presents a continuous-time ΣΔ ADC for MEMS microphone integrated interface applications. The ΣΔ modulator features a 3rd-order loop filter realized with only two operational amplifiers to reduce power consumption. It exploits a 15-level quantizer and 3-MHz sampling frequency to minimize the impact of clock jitter. The proposed architecture can handle an excess loop delay of half period of the sampling clock. The ΣΔ modulator, simulated at transistor-level, performs a 105.5dB A-weighted dynamic range (DR) and a 100.8 dB signal-to-noise-and- distortion ratio (SNDR) at -2 dBFS. The device operates from a single 1.8 V and consumes 200 μW. © 2013 IEEE
Si
paper
Electrical and Electronic Engineering
English
Conference on Ph D Research in Microelectronics and Electronics (PRIME) June 24-27
978-1-4673-4581-1
De Berti, C., Malcovati, P., Crespi, L., Baschirotto, A. (2013). A low-power, continuous-time sigma-delta modulator for MEMS microphones. In Conference Proceedings - 9th Conference on Ph. D. Research in Microelectronics and Electronics, PRIME 2013 (pp.53-56) [10.1109/PRIME.2013.6603116].
De Berti, C; Malcovati, P; Crespi, L; Baschirotto, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/153350
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